TLDR The conclusion is that an algorithm using trichoscopy helps diagnose different types of hair loss but may need updates and a biopsy if results are unclear.
The document from 2010 discusses trichoscopy, a diagnostic tool for hair loss diseases, and introduces an algorithmic approach based on trichoscopic signs. It outlines specific features for alopecia areata (AA), such as black dots and exclamation mark hairs; for androgenetic alopecia (AGA), including hair diameter diversity (HDD) over 20% and yellow dots; and for cicatricial alopecia (CA), characterized by the absence of follicular orifices and signs like perifollicular erythema. The proposed algorithm aids clinicians in diagnosis, with a biopsy recommended when there is a discrepancy between clinical and trichoscopic findings. The document acknowledges that this method is for typical cases and may need future updates.
56 citations,
June 2010 in “Clinical and experimental dermatology” Coudability hairs are useful markers for alopecia areata activity.
199 citations,
April 2010 in “Nature” A gene called APCDD1, which controls hair growth, is found to be faulty in a type of hair loss called hereditary hypotrichosis simplex.
67 citations,
February 2009 in “Journal of Dermatology” 
143 citations,
October 2008 in “Journal of The American Academy of Dermatology” Comma hairs are a specific sign of tinea capitis when viewed with videodermatoscopy.
196 citations,
June 2008 in “International Journal of Dermatology” Dermoscopy helps diagnose and manage alopecia areata by showing specific hair changes.
304 citations,
July 2006 in “Journal of The American Academy of Dermatology” Videodermoscopy improves diagnosis of hair and scalp disorders and may reduce scalp biopsies.
72 citations,
March 2005 in “British Journal of Dermatology” AGA can occur in children with family history; early diagnosis and treatment important.
95 citations,
January 2004 in “Archives of Dermatological Research” Peripilar signs can help diagnose androgenetic alopecia and reveal its cause.
May 2018 in “Journal of cosmetology & trichology” Combining platelet-rich plasma therapy with prostaglandin-F eye drops can significantly regrow hair in alopecia universalis.
89 citations,
March 2018 in “The Journal of Dermatology” Trichoscopy helps diagnose and monitor alopecia areata by looking at a combination of specific hair and scalp features.
November 2016 in “대한피부과학회지” The document's conclusion cannot be summarized as it is not provided in a language I can understand.
